Process of mounting roller-bearing cups



Oct.

4 1927 T. v. BUcKwALTER PROCESSOF MOUNTING ROLLER BEARING CUPS Filed Mann 20, 1926 .2. Sheets-Sheet 1 Mu/vraie'- Oct. 4

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Patented Oct. 4, 19.27.

UNITED STATES l A,1,643,977 rivrlaia'r oFFicE.

TRACY V. BUCKWALTEB, OF CANTON, OHIO, ASSIGNOR T0 THE TIMKEN ROLLER BEAR- ING COMPANY, OF CANTON, OHIO, A CORPORATION Oli OHIO.

PROCESS 0F MOUNTING ROLLER-BEARING CUPS.'

Application led March 20, 1926. Serial No. 96,173.

My invention relates to a process of 'mounting roller bearing cups in hollow hubs or the like.y Heretofore' the practice of mounting roller bearing cupsin hubs and the like has required the outer surface of the cup and the inner surface of the hub to be finished within close limits of tolerance, as from one-thousandth to two-thousandths' of an inch. The expense of such close linishing adds so much to the cost that roller bearings have been heretofore excluded from many uses to which they are otherwise applicable. The purpose of the present invention is to devise a process that will dispense with such accurate finishing and provide for the mounting of the cup and associated parts of the hub more economically than has heretofore been practicable.

The invention consists principally in the process hereinafter described wherein the bearing cup and the hub are sized and fitted by the operation of mounting the cup in the hub. It also consists in the process hereinf after described and claimed.

In the accompanying drawing, wherein like reference numerals refer to like parts wherever vthey occur, I

Fig. 1 is an end view of a section of tubing that constitutes the blank Sfrom which the hub is made, all of the other figures being longitudinal sectional views;

Fig. 2 is a view of the hub blank;

Fig. 3 is a View of the blank that constitutes the spoke flange or similar flanged member;

Fig. 4 illustrates the hub blank with wardly extending shoulders pressed therein;

Fig.- 5 illustrates an early stage of the operation of pressing the wheel'flange onto the hub; a Y

Fig. 6 illustrates the conical bearing' cup;

Fig. 7 illustrates the hub with the wheel Yange and bearing cup pressed in tinal position; i n

Fig. 8 illustrates said hub with all bearing parts iassembled and mounted on a suitable yoke; and

Figs. 9, 10, 11, 12 and 13 illustrate modications hereinafter described. v

In carrying out the present invention, the hub l is made from a section of tubing of sonic material; such as steel, that will permit of the. plastic flow required by the operations hereinafter described, This section of tubl. of the length required for the nished hub and with its inner and outer surfaces concentric, so that the Wall thereof is of uniform thickness. The outer diameter Vof the tube is slightly greater than the inner surface of said hub at suitable points for the roller bearing cup to bear against. Preferably these inwardly extendin projections 3 are made by pressing the wa of the hub l inwardly thereby forming depressions 4 in the outer surface thereof.

The first step in assembling the parts is to press said collar or flange 2lengthwise of the hub 1; andas the inner diameter of said flange is less than the outer diameter of the hub, the effect is to cause a Aplastic flow of the metal of the hub and thereby contractI tlie diameter of such portion'thereof as the flange is forced over. The outwardly extending portion 5 of the flange 2 is preferably forced past the depressions 4 in the outer surface of the hub, leavin the tubular portion of said flange 2 oversai depressions.

After the said flange 2 has been forced to its. desired position, the roller bearing cup 6 is forced endwise into the hub 1 until it brings up against the shoulders 2 provided permit said cup to reach home. This expansion of the diameter of the hub l by the roller bearing cup 6 has the effect of tightening the flange 2 in place and of formin a circumferential rib 7 opposite the en thereof that is well calculated to prevent longitudinal movement of said flange.

Where only one flange 2 is used on the hub, as in Fig. 7, only one end 1a of the hub 1 is reduced by the flange; and in such case the roller bearing cup 6a that isJ forced into` the opposite end 1b is of an outside diameter slightly less than the inside diameter 'of said opposite end. v

After the hub is provided with the flange 2 (which may be adapted to serve as a securing member for wheel spokes, or to serve other suitable purposes) and the bearing cups 6, the outer parts of the bearings are applied and the construction assembled intov a complete structure in accordance with any suitable practice. For instance, Fig. 8 illustrates a member 8 or members riveted to the flange and which may be the spokes or web of a wheel, or pulley or the like. Likewise, the structure embodies taper rollers 9 with cages 10 and cones 11 therefor, all mounted on an axle 12 mounted in a suitable framework 13 and with oil and dust excludin devices 14. Other applications of my hu will readily. suggest lthemselves.

In the modification illustrated in-Fig. 9, one set of pressed shoulders 3 is dispensed with and theflange 2 is secured to the hub by rivets 15. This arrangement furnishes enough of a shoulder for the roller bearing cup to bear against.

In the construction illustrated in Fig. 10,.

the flange 2 is additionally secured on the hub 1 by a circumferential corrugation 16 thereof which arrangement also producesa sufficient abutment for the cup 6.

In the modification illustrated in Fig. 11, there are two hub flanges 2 which are pressed onto the hub from opposite ends thereof and have a disk 17 or spoke members secured between them by means of rivets l18 or the like.

In the' modication illustrated in Fig. 12, the collar or flange 2'is wholly dispensed with, this construction being suitable for use for conveyor rollers or the like.

In the modification illustrated in Fig. 13, the cup 6" is of substantially even thickness throughout and the outer surface thereof is tapered. Conical seats 19 for each cup are formed in the tube, preferably by pressing .and the outer diameter of the `cup `at its large end is somewhat greater than the inner diameter of the tube. When the cup is forced into the tube, it is held by the seat 19 therefor and by the firm engagement of the outer end portion of the cup with the tube 1. The taper of the outer surface of the cup and of the seats therefor may be less than the angle of repose for the respective metals; so that the cup will not slip ofi'A the seat.

It is noted that the fitting of the cup in the hub, which has heretofore necessitated the operation of furnishing both the hub and the cup within narrow limits of tolerance, is accomplished by the operation'of mounting the cup in the hub. As this operation is press Work, and the hub material will permit of plastic'sfiow, the operation is very simple, inexpensive and precise' and the parts are so firmly secured together as to require no other special provision therefor. In View of the great reduction thus effected in the cost of assembling the parts, it becomes economically practicable .to apply roller bearings to many uses from which they have heretofore been excluded by reason of the expensive cost thereof.

What'I claim is:

1. rIlhe process of mounting vroller bearing said hub a fianged member having a tubular portion whose innerA diameter is sufficiently' less than thei outside diameter of the hub to require plastic fllow of the hub metal, thereby reducing the 'diameter of the hub so that its inside diameter is less than the outside diameter of the cup by such amount that the cup cannot enter said hub Without .such plastic flow, and forcing said cup endwise into said hub.

3. 'lhe process of mounting roller bearmg cups in hubs, which comprises forcing onto said hub a flanged member havin a ytubular portion whose inner diameter is ess than the outside diameter of the hub, thereby reducing the diameter of the hub so that its inside diameter is less than the outside diameter of the cup, forcing said cup endwise into said hub, placing anannular disk member on said hub, forcing onto the opposite end of said hub a second flange member similar to said first fiange member so that said disk member is firmly held between said flange members and forcing into the opposite end of said hub a second bearing cup.

4. The processof mounting roller bearing c'ups in hubs, which comprises forcing onto said-hub a flanged member having a tubular portion whose inner diameter is less than .the outside diameter of the hub, thereby reducing the diameter of the hub so that its inside diameter is less than vthe outside diameter ofthe cup, forcing said cup endwise into saidhub, placingan annular disk member on said hub, forcing onto the opposite end ofksaid hub a second flan e member i similar to said first flange mem er so that said disk member is firmly v held between said flange members riveting saidffianges and disk member together and forcing linto the opposite end of said hub a second bearin cup.

igned at Canton, Ohio, this 6th day of Mar., 1926.

TRACY V. 'BUCKWALTER 

